**Maryland Education Standards**. What Are Open Number Sentences? Open number sentences are equations that give one part of the equation along with the answer. In order to solve an open number
sentence, the inverse operation is used. Read More...

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Study GuideOpen Number SentencesWorksheet/Answer keyOpen Number SentencesWorksheet/Answer keyOpen Number SentencesWorksheet/Answer keyOpen Number Sentences

MD.1.0. Knowledge of Algebra, Patterns, and Functions: Students will algebraically represent, model, analyze, or solve mathematical or real-world problems involving patterns or functional relationships.

1.B.1. Expressions, Equations, and Inequalities: Write and identify expressions.

1.B.1.a. Represent numeric quantities using operational symbols (+, -, x, /) (Assessment limit: Use operational symbols (+ or -) and whole numbers (0 - 50)).

1.B.2. Expressions, Equations, and Inequalities: Identify, write, solve, and apply equations and inequalities.

1.B.2.a. Represent relationships using appropriate relational symbols (<, >, or =) and operational symbols (+, -, x, /) on either side (Assessment limit: Use operations symbols (+ or -) and whole numbers (0 - 1000)).

1.B.2.b. Find the missing number (unknown in a number sentence (equation using operational symbols (+, -, x, /) (Assessment limit: Use one operational symbol (+ or -) and whole numbers (0 - 100)).

1.B.2.c. Find the missing number(s) (unknown on one or both sides of a number sentence (equation).

MD.6.0. Knowledge of Number Relationships and Computation/Arithmetic: Students will describe, represent, or apply numbers or their relationships or will estimate or compute using mental strategies, paper/pencil, or technology.

6.C.1. Number Computation: Analyze number relations and compute.

6.C.1.f. Represent multiplication and division basic facts using number sentences, picture, and drawings (Assessment limit: Use basic facts of no more than 9 x 9 = 81).

MD.7.0. Processes of Mathematics: Students demonstrate the processes of mathematics by making connections and applying reasoning to solve problems and to communicate their findings.

7.A.1. Problem Solving: Apply a variety of concepts, processes, and skills to solve problems

7.A.1.d. Apply a strategy, i.e., draw a picture, guess and check, finding a pattern, writing an equation

7.C.1. Communications: Present mathematical ideas using words, symbols, visual displays, or technology

7.C.1.a. Use multiple representations to express concepts or solutions

7.C.1.d. Express solutions using concrete materials

7.C.1.e. Express solutions using pictorial, tabular, graphical, or algebraic methods

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